<s>
Sliced	B-Algorithm
inverse	I-Algorithm
regression	I-Algorithm
(	O
or	O
SIR	O
)	O
is	O
a	O
tool	O
for	O
dimensionality	B-Algorithm
reduction	I-Algorithm
in	O
the	O
field	O
of	O
multivariate	B-General_Concept
statistics	I-General_Concept
.	O
</s>
<s>
Dimensionality	B-Algorithm
reduction	I-Algorithm
aims	O
to	O
achieve	O
this	O
by	O
showing	O
only	O
the	O
most	O
important	O
dimension	O
of	O
the	O
data	O
.	O
</s>
